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Measurement of elastic Υ photoproduction at HERA

Abstract:

The photoproduction reaction γp → μ+ μ-p has been studied in ep interactions using the ZEUS detector at HERA. The data sample corresponds to an integrated luminosity of 43.2pb-1. The Υ meson has been observed in photoproduction for the first time. The sum of the products of the elastic Υ(1S), Υ(2S),Υ(3S) photoproduction cross sections with their respective branching ratios is determined to be 13.3 ± 6.0(stat.)-2.3+2.7(syst.) pb at a mean photon-proton centre of mass energy of 120 GeV. The cro...

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Journal:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics More from this journal
Volume:
437
Issue:
3-4
Pages:
432-444
Publication date:
1998-10-08
ISSN:
0370-2693
Language:
English
Pubs id:
pubs:160776
UUID:
uuid:f63fe684-3824-4f32-bc74-9be09f42d087
Local pid:
pubs:160776
Source identifiers:
160776
Deposit date:
2012-12-19

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